シラン処理ガラス粒子へのイオン性界面活性剤の吸着による界面動電位の変化

概要

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Silanol groups on glass particles were to some extent, exchanged with trimethyl silane (TMS) or triethyl silane (TES). This surface treatment reduced the charge on glass particles and made it hydrophobic as shown by the measurement of contact angle of water on silane treated glass plate. The surface of glass particles was treated and electrokinetic potentia1 was measured by the streaming potential method. The fraction of silanol groups remained was estimated as (σ/σ_g)_0. The amount of adsorption of cationic or anionic surfactant ions on these treated particles was investigated by the change of surface charge density. The amount of adsorption was changed by the hydrophobic and electrostatic properties of particles and surfactant ions. The adsorbed amount of sodium dodecyl sulfate (SDS) increased with the degree of silane-treatment but that of dodecylamine hydrochloride (DAHC1) showed maximum adsorption at about (σ/σ_g)_0≒0.4.
公益社団法人日本薬学会の論文
1974-04-25